随笔分类 -  数据库

ubuntu12.04源码安装mysql5.6
摘要：一,卸载原来的1sudoapt-getautoremove--purgemysql-server-5.02sudoapt-getremovemysql-server3sudoapt-getautoremovemysql-server4sudoapt-getremovemysql-common (非常... 阅读全文
posted @ 2014-12-19 15:48 hmily_qin
select执行过程
摘要：SELECT语句的执行的逻辑查询处理步骤：(11) (1)FROM (3) JOIN (2) ON (4)WHERE (5)GROUP BY (6)WITH {CUBE | ROLLUP}(7)HAVING (8)SELECT (9)DISTINCT(10)ORDER BY 每个步骤产生一个虚拟... 阅读全文
posted @ 2014-10-26 20:32 hmily_qin 阅读(1134) 评论(0) 推荐(0)